Key to Unit 2Part I Pre-readingSection B Listening Practice1.express2. broadly3. far apart4. variations5. Written English6. accents7. greet8. migrate into9. more freely 10. guessPart II Active Reading: Language LearningTask OneChoose the best answer for the following questions or incomplete statements.1. D2. B3. C4.A5.CPart III Language FocusTask OneFill in the blanks with the words or phrases given in the box. Change the form where necessary. You may not use any of the words or phrases more than once.1. immersed2. crucial3. come over4. fantasize5. deduce6. attain7. nursed8. assemble9. mocked 10. adornTask TwoTranslate the following sentences into English, using the words or phrases in brackets.1. This discovery was perceived as a crucial breakthrough.2. Michelle had a nasty feeling when she was sandwiched between two fat men on the bus.3. I took pity on him and lent him money to nurse his foot injury.4. Detectives can deduce from snatches of conversation who have committed the crime.5. His constant complaints were straining our patience, and his boss gathered his brows into a frown.6. I overheard two girls talking about the clown with a mocking voice.Part IV Chinese & Foreign Culture IntroductionTask OneTranslate the following passage into English.The Evolution of Chinese CharacterIn the long course of history, the Chinese characters had experienced several times of evolution before they took the present form.Even in the Shang Dynasty which was 3,000 years ago, oracle bone inscription, a well-developed writing, already existed in China. It was a writing etched in tortoise shells. Inscription on bronze, also known as bronze ware script, was a kind of writing cast in the bells and tripods. Large seal script widely used in many vassal states in the Spring and Autumn and Warring States Period was more regular and symmetrical than bronze ware script in writing. Small seal script was used in China after Emperor Qin Shi Huang’s unification of whole China, and its structure was simple, writing method was changeless and character pattern was more orderly. Clerical writing was a kind of writing used in the Han Dynasty, and it developed from the small seal script. Regular script firstly appeared in the late Han Dynasty, and it has been used by the people generation after generation to this day because it is much more simple and easy to be written than the clerical writing. Regular script is the formal writing style in our daily life and business. Born in the late Han Dynasty, the cursive writing is difficult to identify because it is written in a quick way and its strokes are cursively connected with each other, and this kind of writing is usually seen in calligraphic works.Task Two︱Translate the following paragraphs into Chinese.大约在公元前410年，在罗马人离开英国后，英语以其特有的能力，吸收、进化、侵略及偷用它国的词汇。
自外来移民开始接触英语，英语还没走出国门就在不断发展壮大。
首先从海上，然后通过高速互联网，英语从超过350种语言里剽窃大量词汇，使自己变成了全球性语言。
现在大约有15亿人在说英语，这些人中有1/4是本土人，1/4是作为第二语言。
现代英语的变体确实跟得上时代，有北印度英语，中式英语，新加坡英语。
总而言之，英语跟英国的关系微乎其微，也许到了不该称之为“英语”的时候了。
Part V Academic Reading：Biological EngineeringTask OneFill in the following blanks based on your understanding of the text.1. artificial embryo twinning, somatic cell nuclear transfer2. Twinning, unspecialized cells3. genetically identical4. the germ cells, every somatic cell5. a freshly fertilized eggTask TwoTranslate the following sentences into Chinese.1. 人工胚胎孪化是一种技术含量相对较低的克隆方法。
顾名思义，这种技术模拟自然分娩同卵双胞胎的过程。
2. 早期胚胎分离成单个细胞, 在有盖的培养皿中很短时间内还可以分化和发育。
3. 体细胞是体内除了精子和卵子这两种类型的生殖细胞外的任何细胞。
4. 多莉羊是一只完完全全的基因复制羊，它与提供体细胞的成年母羊基因基本相同，是第一只由成年体细胞克隆的哺乳动物。
5. 在受精时，精子和卵子有各自的染色体。
但在精子与卵子融合时，发育的胚胎则具有两套染色体，其中一套染色体来自精子，另一套染色体来自卵子。
Part VI Academic Writing: Research with Search EnginesTask( open-ended )Part VII Developing Skills: Letters of ThanksTaskDear Jack，You are sweet to give a pen for me, and I appreciate it more than I can say. I don’t know how you managed to keep it such a secret! It is a complete surprise to me, and a thrill I’ll never forget.I was overwhelmed by the wealth of the lovely pen I received unexpectedly. The cap of the pen is especially lovely. Thank you again for the party and for your generous gift!With love,Leeza。